Protocol Sirens and Steel vs Idle Stone Breakers

Protocol Siren & Steel is an action packed strategy game where emergency response meets powerful steel machines. Step into high intensity missions that demand fast thinking, precision control, and tactical decision making.

Build Your Dream Team Unlock up to 11 unique heroes, each with their own skills and abilities. Level them up, upgrade their gear, and watch your team's power skyrocket! Deep Growth Systems - Level up, Star up, and Tier up your heroes - Upgrade weapons and hats for each hero - Master active & passive skills with Breakthrough and Specialization - Embed powerful Gems to boost your stats - Collect Relics and complete the Compendium for massive bonuses Idle Mine & Offline Rewards Your mines keep producing even when you're offline. Come back to a pile of resources and push even further! Challenge Dungeons Take on special dungeons — Gold, Material, Gem, Skill, and Hero challenges — to earn rare rewards and climb to new heights. Daily Rewards & Events Log in every day for sign-in bonuses, complete daily tasks, and enjoy ongoing activity rewards to keep your progress going. Simple & Satisfying Easy to pick up, deeply rewarding to master. Perfect for casual players who love watching numbers grow! Download now and start smashing!